The present invention provides a magnetic recording medium having high recording density and excellent storage property, and it provides a floppy disk, which includes a magnetic disk incorporated in a shell having a liner on inner side thereof, the magnetic disk having a magnetic film formed at least on one side of a flexible support member, and the liner contains a rust preventive agent.

A case for an electronic device protects and extends the battery life of the electronic device. The case has a lower case portion and an upper case portion, which assemble together to protect the top, side, and bottom edges of the electronic device. The lower case portion includes a battery to extend the battery life of the electronic device.

The disc protection casing includes a disc protection casing body having a disc receiving space therein. A disc holder, insertable into the interior of the disc protection casing body, has an elastic member formed at one end of the same for supporting a disc. When the disc holder is inserted into the casing body, a shoulder on the elastic member contacts a guide member in the casing body and the elastic member releases a disc supported thereby.

The disc protection casing includes a disc protection casing body having a disc receiving space therein. A disc holder, insertable into the interior of the disc protection casing body, has an elastic member formed at one end of the same for supporting a disc. When the disc holder is inserted into the casing body, a shoulder on the elastic member contacts a guide member in the casing body and the elastic member releases a disc supported thereby.

A package for retaining compact discs and computer discs includes a retention panel and a first folded sidewall section extending from the retention panel. The first folded sidewall section includes a first contour edge substantially corresponding to a periphery of the compact disc, and two first cut-out portions for accommodating insertion of two corners of the computer disc. The package also includes a second folded sidewall section extending from the retention panel. The second folded sidewal...

The present invention includes a postcard for carrying a disk medium, such as a compact disk or digital video disk, through the mails. In a preferred embodiment, the postcard includes a first sheet, which contains, on its front side, an area for an image or message, and a means for attaching a disk medium. The means for attaching a disk medium is preferably a clear plastic pocket. The postcard includes a filler card and optionally an insert sheet, which are placed next to the first sheet. The po...

A data storage disk cartridge having a dual housing structure includes an inner housing that contains a disk, and an outer housing that contains the inner housing. The inner housing is at least partially removable from the outer housing for insertion into a disk drive. The outer housing remains external to the disk drive, however, except for a portion that is inserted into the drive to provide a docking channel for retraction of the inner housing. A shutter on the inner housing covers a portion ...

A disc package for retaining a disc includes a retention panel having a first surface in substantial contact with a face of the disc when the disc is inserted within the package, and a cover panel which is contiguous with the retention panel and which shares with the retention panel a common edge. The common edge includes a fold line about which the cover panel is folded so as to be substantially superposed with the retention panel. The disc package also includes a disc retainment section positi...

A disc cartridge housing a driving rotating unit and adapted to be loaded along with the driving rotating unit on a recording and/or reproducing apparatus. A shutter mechanism for opening/closing an opening provided in a main cartridge body portion includes two shutter members movable along the major surface of the main cartridge body portion. An area in which the first shutter member and the second shutter member are moved is delimited by first and second wall sections arranged facing each othe...

A disc cartridge of the open cover type capable of readily accomplishing takeout and insertion of a disc medium with respect to the cartridge while ensuring easiness of assembling thereof and increased reliability in operation thereof. An upper casing member is formed on a side surface thereof opposite from a shutter with a takeout opening which permits a disc medium to be taken out of a casing therethrough. The casing is mounted thereon with a cover for opening and closing the takeout opening. ...